Metal coupling beam damper capable of realizing damage control and damage detection

Abstract

The utility model relates to the field of structural health monitoring, and discloses a metal coupling beam damper capable of realizing damage control and damage detection, which comprises a web plate, end plates are fixedly arranged on two sides of the web plate, flange plates are fixedly mounted at two ends of the web plate, positioning steel plates are arranged on opposite surfaces of the end plates, and the positioning steel plates are fixedly mounted on the web plate. High-strength bolts are installed between the end plates and the positioning steel plate in a penetrating mode, and piezoelectric transducer fixing devices are installed between the end plates. The positioning steel plate is in direct contact with the concrete end of the coupling beam and used for determining the position of the bolt hole connected with the end plate, installation is convenient, the small bolt hole is reserved in the 1 / 4 position of the long side of the positioning steel plate and used for positioning, the distance between the position of the small bolt hole and the edge of the steel plate is 2-5 cm, and the positioning steel plate can be fastened on the coupling beam without falling off. The connecting beam damper is ensured to be connected with a flat end face through the positioning steel plate, and the situation that transmission of shearing force is affected due to uneven gaps between the concrete connecting beam and the end plate is prevented.

Description

Technical Field

[0001] The utility model relates to the field of structural health monitoring, in particular to a metal coupling beam damper capable of realizing damage control and damage detection. Background Art

[0002] The connecting beam damper is the first line of defense for earthquake-resistant structures. Under the action of an earthquake, as the weakest component of the entire structure, the connecting beam damper dissipates energy through displacement, friction, and other methods. However, as the "fuse" of the shock-absorbing structure, after an earthquake, the connecting beam damper may suffer mechanical damage due to energy dissipation. If this damage is not discovered and the damper is not replaced in time, the seismic resistance of the shock-absorbing structure will be reduced. Currently, most of the detection of connecting beam dampers focuses on the detection of the displacement or rotation angle of the connecting beam damper. Although this can reflect the status of the connecting beam damper to a certain extent, it cannot detect the energy consumption of the connecting beam damper and the remaining energy dissipation capacity. Therefore, it is particularly important to provide a device that can timely detect the damage of the connecting beam damper and more intuitively reflect the energy dissipation capacity of the structure.

[0003] Metal shear coupling dampers are common energy dissipation devices, often used in shock-absorbing structures. They withstand shear forces during operation, and damage can occur to the web, flanges, and ribs. These damage types include web tearing, web buckling, tearing at the flange-to-web connection, fracture at the flange-to-endplate connection, tearing at the rib-to-web connection, and fracture at the rib-to-endplate connection. Therefore, by using webs made of low-yield-point steel and designing the end plates and ribs accordingly, damage can be limited to the web. Testing the web can significantly improve detection accuracy.

[0004] The piezoelectric fluctuation method is a common damage detection method. The piezoelectric signal of the damper before and after damage is measured by the piezoelectric fluctuation method. Through deep learning, the characteristics of the piezoelectric signal are extracted and the degree of damage is calibrated to realize the detection of the coupling beam damper.

[0005] After searching, patent publication number CN204255398U discloses a system for monitoring the performance of wall dampers under earthquake action. The system comprises inner and outer panels of the wall damper, respectively fixed to the upper and lower beams, a variable measuring device for measuring the horizontal shear force and horizontal relative displacement between the inner and outer panels of the wall damper, a signal amplifier, a signal transmission line, and a signal acquisition device. Fixed brackets are installed on the inner and outer panels of the wall damper, and the variable measuring device is fixed to the brackets. The signals collected by the variable measuring device are transmitted through a signal amplifier and a signal transmission line to a data acquisition device that converts the collected signals into digital signals. The digital signals are then finally stored in a data storage device through a data transmission line. However, the detection of displacement or rotation angle in the prior art documents cannot fully reflect the state of the structure, such as energy consumption. In addition, the real-time monitoring devices in the prior art documents are expensive and contain a lot of invalid data. The piezoelectric wave method for measuring metal shear beam dampers can only detect the web. Utility Model Content

[0006] The purpose of the present utility model is to provide a metal coupling beam damper capable of achieving damage control and damage detection, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A metal connecting beam damper capable of achieving damage control and damage detection comprises a web, end plates fixedly provided on both sides of the web, flange plates fixedly installed at both ends of the web, positioning steel plates provided on opposite sides of the end plates, high-strength bolts penetrated between the end plates and the positioning steel plates, piezoelectric transducer fixing devices are installed between the end plates, a piezoelectric transducer body is fixedly installed inside the piezoelectric transducer fixing devices, small bolts penetrated between the high-strength bolts and on the piezoelectric transducer fixing devices, a small bolt hole is reserved for positioning at 1 / 4 of the long side of the positioning steel plate, and the small bolt hole is located 2 to 5 cm away from the edge of the steel plate.

[0009] Preferably, the positioning steel plate is in direct contact with the concrete end of the coupling beam to determine the position of the bolt holes connected to the end plate.

[0010] Preferably, the end plate of the connecting beam damper is anchored on the concrete connecting beam by high-strength bolts, wherein the positions of the bolt holes correspond to the positions of the high-strength bolt holes on the positioning steel plate.

[0011] Preferably, four bolt holes are evenly arranged in the length direction of the end plate, and three bolt holes are evenly arranged in the width direction of the end plate.

[0012] Preferably, the diameter of the bolt hole consists of a rectangle and semicircles at both ends, and the distance between the outer edge of the hole and the edge of the end plate is about 5 to 10 cm.

[0013] Preferably, the web and the end plates are connected by welding, the flange plates are connected to the web and the end plates by welding, and the web is a rectangular steel plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The positioning steel plate is in direct contact with the concrete end of the coupling beam to determine the position of the bolt holes connected to the end plate for easy installation. A small bolt hole is reserved at 1 / 4 of the long side of the positioning steel plate for positioning. The small bolt hole is located 2 to 5 cm from the edge of the steel plate. It is required that the positioning steel plate can be fastened to the coupling beam without falling off. The positioning steel plate ensures that the coupling beam damper is connected to the flat end surface to prevent uneven gaps between the concrete coupling beam and the end plate from affecting the transmission of shear force.

[0016] (2) The end plate of the coupling beam damper is anchored to the concrete coupling beam by high-strength bolts. The positions of the bolt holes correspond to the positions of the high-strength bolt holes on the positioning steel plate. Four bolt holes are evenly arranged in the length direction of the end plate, and three bolt holes are evenly arranged in the width direction of the end plate. The diameter of the bolt holes consists of a rectangle and semicircular ends to facilitate calibration of the components during assembly. The distance between the outer edge of the hole and the edge of the end plate is about 5 to 10 cm.

[0017] (3) The web and end plates are connected by welding, and the flange plates are connected to the web and end plates by welding. The web is a rectangular steel plate. In order to reduce the stiffness of the flange plate, its width in the middle is reduced and designed into a concave curve;

[0018] (4) The device includes two piezoelectric transducer fixing devices, and three bolt holes are reserved in the middle of the end plate near the web. The piezoelectric transducer is fixed at a specified position by the piezoelectric transducer fixing device and is closely attached to the end plate of the metal shear type coupling beam damper;

[0019] (5) The device includes two cylindrical piezoelectric transducers, one transducer is the excitation end, which sends signals, and the other transducer is the receiving end, which receives signals. When the device is operating normally, it can send a detection signal to calibrate whether the signal is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the present utility model.

[0021] Figure 2 This is a schematic diagram of the partial structure of the piezoelectric transducer body in the present utility model.

[0022] Figure 3This is a schematic diagram of the partial structure of the piezoelectric transducer fixing device in the present utility model.

[0023] Figure 4 This is a schematic diagram of the partial structure of the piezoelectric transducer fixing device in the present invention from a top view.

[0024] Figure 5 It is a partial cross-sectional view of the piezoelectric transducer fixing device in the present utility model.

[0025] The meanings of the numbers in the figure are: 1. end plate; 2. positioning steel plate; 3. high-strength bolt; 4. small bolt; 5. flange plate; 6. piezoelectric transducer fixing device; 7. piezoelectric transducer body; 8. web. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides a technical solution:

[0028] A metal coupling beam damper capable of achieving damage control and damage detection, see Figure 1-Figure 5 , including a web 8, with end plates 1 fixedly provided on both sides of the web 8, and the end plates 1 of the coupling beam damper are anchored on the concrete coupling beam by high-strength bolts 3, wherein the positions of the bolt holes correspond to the positions of the high-strength bolt holes on the positioning steel plate 2;

[0029] Specifically, such as Figure 1 、 Figure 2 and Figure 3 As shown, when in use, the device includes two piezoelectric transducer fixing devices 6, and three bolt holes are reserved in the middle of the end plate 1 near the web 8. The piezoelectric transducer body 7 is fixed in a specified position through the piezoelectric transducer fixing devices 6 and is closely attached to the end plate 1 of the metal shear type coupling beam damper;

[0030] Four bolt holes are evenly arranged along the length of the end plate 1, and three bolt holes are evenly arranged along the width of the end plate 1. The diameter of the bolt holes consists of a rectangle and semicircles at both ends. The distance between the outer edge of the hole and the edge of the end plate 1 is about 5 to 10 cm.

[0031] Specifically, such as Figure 4 and Figure 5 As shown, when in use, the diameter of the bolt hole consists of a rectangle and semicircles at both ends, which is convenient for alignment of the components during assembly;

[0032] Both ends of the web 8 are fixedly installed with flange plates 5, and the opposite surfaces of the end plates 1 are provided with positioning steel plates 2. The positioning steel plates 2 are in direct contact with the concrete end of the coupling beam to determine the position of the bolt holes connected to the end plates 1, which is convenient for installation. A small bolt hole is reserved at 1 / 4 of the long side of the positioning steel plate 2 for positioning. The position of the small bolt hole is 2 to 5 cm away from the edge of the steel plate.

[0033] Specifically, such as Figure 1 and Figure 2 As shown, when in use, it is required that the positioning steel plate 2 can be fastened to the coupling beam without falling off. The positioning steel plate 2 ensures that the coupling beam damper is connected to the flat end surface, preventing uneven gaps between the concrete coupling beam and the end plate 1 from affecting the transmission of shear force.

[0034] High-strength bolts 3 are installed between the end plate 1 and the positioning steel plate 2. Piezoelectric transducer fixing devices 6 are installed between the end plates 1. The piezoelectric transducer body 7 is fixedly installed inside the piezoelectric transducer fixing device 6. Small bolts 4 are installed between the high-strength bolts 3 and on the piezoelectric transducer fixing device 6. The web 8 is connected to the end plate 1 by welding. The flange plate 5 is connected to the web 8 and the end plate 1 by welding. The web 8 is a rectangular steel plate.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, when in use, in order to reduce the stiffness of the flange plate 5, its width in the middle is reduced and designed to be a concave curve. The device includes two cylindrical piezoelectric transducer bodies 7, one transducer is the excitation end, sending signals, and the other transducer is the receiving end, receiving signals. When the equipment is operating normally, it can send a detection signal to calibrate whether the signal is normal.

[0036] Working Principle: When in use, first, the positioning steel plate 2 is directly contacted with the concrete end of the coupling beam to determine the position of the bolt holes connected to the end plate. Then, the positioning steel plate 2 is used to ensure that the coupling beam damper is connected to the flat end surface. Then, the coupling beam damper end plate 1 is anchored to the concrete coupling beam with high-strength bolts 3, and is connected to the end plate 1 through the web plate 8 by welding. The flange plate 5 is also connected to the web plate 8 and the end plate 1 by welding.

[0037] Secondly, the device includes two piezoelectric transducer fixing devices 6. Three bolt holes are reserved in the middle of the end plate 1 near the web 8. The piezoelectric transducer body 7 is fixed in a specified position through the piezoelectric transducer fixing devices 6 and is closely attached to the end plate 1 of the metal shear type coupling beam damper.

[0038] Finally, the device includes two cylindrical piezoelectric transducer bodies 7, one transducer is the excitation end, sending signals, and the other transducer is the receiving end, receiving signals. When the device is operating normally, it can send a detection signal to calibrate whether the signal is normal.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal coupling beam damper capable of achieving damage control and damage detection, comprising a web (8), characterized in that: End plates (1) are fixedly installed on both sides of the web (8), flange plates (5) are fixedly installed on both ends of the web (8), and positioning steel plates (2) are provided on opposite sides of the end plates (1). High-strength bolts (3) are installed through the end plates (1) and the positioning steel plates (2). Piezoelectric transducer fixing devices (6) are installed between the end plates (1), and a piezoelectric transducer body (7) is fixedly installed inside the piezoelectric transducer fixing device (6). Small bolts (4) are installed through the high-strength bolts (3) and on the piezoelectric transducer fixing device (6). A small bolt hole is reserved at 1 / 4 of the long side of the positioning steel plate (2) for positioning, and the position of the small bolt hole is 2 to 5 cm away from the edge of the steel plate.

2. The metal coupling beam damper capable of achieving damage control and damage detection according to claim 1, characterized in that: The positioning steel plate (2) is in direct contact with the concrete end of the coupling beam and is used to determine the position of the bolt hole connected to the end plate (1).

3. The metal coupling beam damper capable of achieving damage control and damage detection according to claim 1, characterized in that: The coupling beam damper end plate (1) is anchored on the concrete coupling beam via high-strength bolts (3), wherein the positions of the bolt holes correspond to the positions of the high-strength bolt holes on the positioning steel plate (2).

4. The metal coupling beam damper capable of achieving damage control and damage detection according to claim 1, characterized in that: Four bolt holes are evenly arranged in the length direction of the end plate (1), and three bolt holes are evenly arranged in the width direction of the end plate (1).

5. The metal coupling beam damper capable of achieving damage control and damage detection according to claim 4, characterized in that: The diameter of the bolt hole is composed of a rectangle and semicircles at both ends, and the distance between the outer edge of the hole and the edge of the end plate (1) is 5 to 10 cm.

6. The metal coupling beam damper capable of achieving damage control and damage detection according to claim 1, characterized in that: The web (8) is connected to the end plate (1) by welding, and the flange plate (5) is connected to the web (8) and the end plate (1) by welding. The web (8) is a rectangular steel plate.

Images